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// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef UI_OZONE_PLATFORM_WAYLAND_HOST_WAYLAND_SHM_BUFFER_H_
#define UI_OZONE_PLATFORM_WAYLAND_HOST_WAYLAND_SHM_BUFFER_H_
#include "base/memory/shared_memory_mapping.h"
#include "third_party/skia/include/core/SkCanvas.h"
#include "third_party/skia/include/core/SkSurface.h"
#include "ui/gfx/geometry/size.h"
#include "ui/ozone/platform/wayland/common/wayland_object.h"
namespace ui {
class WaylandBufferFactory;
// Encapsulates a Wayland SHM buffer, covering basically 2 use cases:
// (1) Buffers created and mmap'ed locally to draw skia bitmap(s) into; and
// (2) Buffers created using file descriptor (e.g: sent by gpu process/thread,
// through IPC), not mapped in local memory address space.
// WaylandShmBuffer is moveable, non-copyable, and is assumed to own both
// wl_buffer and WritableSharedMemoryMapping (if any) instance.
class WaylandShmBuffer {
public:
WaylandShmBuffer(WaylandBufferFactory* buffer_factory, const gfx::Size& size);
WaylandShmBuffer(const WaylandShmBuffer&) = delete;
WaylandShmBuffer& operator=(const WaylandShmBuffer&) = delete;
~WaylandShmBuffer();
WaylandShmBuffer(WaylandShmBuffer&& buffer);
WaylandShmBuffer& operator=(WaylandShmBuffer&& buffer);
// Buffer is valid if it has been successfully created (and mapped, depending
// on the constructor used).
bool IsValid() const { return !!buffer_; }
// Returns the underlying raw memory buffer, if it's currently mapped into
// local address space, otherwise return nullptr
uint8_t* GetMemory();
// Returns the underlying wl_buffer pointer
wl_buffer* get() const { return buffer_.get(); }
// Returns the Size used to create this buffer
const gfx::Size& size() const { return size_; }
int stride() const { return stride_; }
private:
void Initialize(WaylandBufferFactory* buffer_factory);
gfx::Size size_;
int stride_;
wl::Object<wl_buffer> buffer_;
base::WritableSharedMemoryMapping shared_memory_mapping_;
};
} // namespace ui
#endif // UI_OZONE_PLATFORM_WAYLAND_HOST_WAYLAND_SHM_BUFFER_H_
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